[2] _Involuntary Sexual Orgasm._--This is a very cumbrous rendering of the German _Pollution_. In English we greatly need a general term, first, to denote all involuntary emissions of semen, whether nocturnal or diurnal; and, secondly, to denote involuntary sexual orgasm in the female as well as in the male. In the case of the female, the term "seminal emission" is inapplicable; but the term "pollution" may be applied in English (as it is in German) to such phenomena in either sex. By American writers the term "pollution" is now generally used (_e.g._, Allen, "Disorders of the Male Sexual Organs," _Twentieth Century Practice_, vol. vii. p. 612 _et seq._). My first inclination, therefore, was to adopt the rendering "pollution" in this translation. But this word inevitably connotes the ideas of physical uncleanness and moral defilement, and its use would thus assist the survival of medieval ideas of the essentially corrupt nature of sexual passion--such ideas as are exemplified by the quaint survival among certain "occultists" of the medieval doctrine of _incubi_ and _succubi_, by the belief that sexual dreams are induced by the "thought-forms" of other persons tormented by ungratified sexual desire! For this reason I have not attempted to acclimatise the word "pollution" in this country.--TRANSLATOR'S NOTE. [3] _L'Hygiene sexuelle_, Paris, 1895, p. 27. [4] Thalhofer, _Die Sexuelle Paedagogik bei den Philanthropen_, Kempten, 1907. [5] Rudeck, _Die Liebe_ (Leipzig, undated), p. 158. [6] Groos, _Die Spiele der Tiere_ (_The Games of Animals_), Jena, 1896. [7] See a translation by Dr. Brill, of New York, of Freud's _Selected Papers on Hysteria and other Psychoneuroses_ (1909). [8] _Die Stoerungen der Geschlechtsfunctionen des Mannes_ (_The Disturbances of the Male Sexual Functions_), 2nd ed., Vienna, 1901, p. 8. [9] Otto Adler, _Die mangelhafte Geschlechtsempfindung des Weibes_ (_Inadequacy of Sexual Sensation in Woman_), Berlin, 1904, p. 54 _et seq._ [10] Marthe Francillon, _Essai sur la Puberte chez la Femme_, Paris, 1906. [11] _Man and Woman_, 4th ed., London, 1904. [12] _Der Koerper des Kindes_ (_The Body of the Child_), Stuttgart, 1903. [13] Halban, _Die Entstehung des Geschlechtscharakters_ (_The Origin of Sexual Differentiation_), Archiv fuer Gynaekologie, vol. lxx., Heft 2. p. 268. [14] _Man and Woman_, London. [15] _Weib und Mann_, Berlin, 1897, p, 116. [16] Meumann, _Vorlesungen zur Einfuehrung in die experimentelle Paedagogik und ihre psychologische Grundlagen_ (_Introductory Lectures on Experimental Pedagogy and its Psychological Basis_), Leipzig, 1907, vol. i. p. 145. [17] _Zeitschrift fuer Psychologie_, Leipzig, 1906, p. 384. [18] _Geschlecht und Krankheit_ (_Sex and Disease_), Halle, 1903. [19] _Die Hysterie im Kindesalter_ (_Hysteria in Childhood_), 2nd ed., Halle, 1906. [20] _Die Hysterie des Kindes_ (_Hysteria in the Child_), p. 8, Berlin, 1905.